Improvement in sewing-machines



G. FETTER.

Sewing Machine.

No. 19,059. V Patented Jan 5. 1858.

N. PETERS. Fhmn-Lithognphcr. wan-i am, D. C,

UNITED STATES PATENT OFFICE.

GEORGE FETTER, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO HIMSELF ANDEDVVABD JONES, OF SAME PLACE.-

IMPROVEMENT IN SEWING-MACHINES.

To all whom, itflnay concern:

Be it known that I, Gnonou Forum, of the city of Philadelphia and Stateof Pennsylvania, have invented certain new and useful Improvements inSewing-Machines; and I do hereby declare the following to be a full,clear, and exact description of the same, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

My invention relates to improvements in sewing-machines for formingeither the double chainstitch or the ordinary single chain-stitch; andmy improven'lents consist in so attaching a 100 per to a spindle thatthe former may be readily adjusted to the latter, the spindle be ingallowed to turn, so as to accommodate itself to the lateral movement ofthe looper, as

fully described hereinafter.

The looper is so combined with a small finger that it may be readilyadapted to the formation of either double or single chain-stitch, andthis without disturbing the working or other parts of the machine.

In order to enable others skilled in the art to make and use myinvention, 1. will 110w proeeed to describe its construction and operato the vibrating arm 5 Fig. 5, a view of the looper as adapted forforming the ordinary chain-stitch from a single thread.

Similar letters refer to similar parts throughout the several views.

A is the base of the machine, upon which is secured the box 13, the arm0 projecting from and forming a part of the box.

D is the driving-shaft, to which is secured the cam-wheel E. On thefront face of the latter is a double-scroll-cam recess for operating theneedle-lever F, and in the back face another scroll-cam recess forimparting a vibrating motion to the horizontal shaft 1.

H is the needle-bar, operated by the lever F Specification forming partof Letters Patent No. [9,059, dated January 5, 1858.

description to them in this specification will be unnecessary.

Tothe spindle P is secured the arm M, the top of which projects, so asto form a bearing for the top of the spindle f, the bottom of the latterturning in an orifice in the spindle P. In the spindle N are two slotsfor receiving the legs of the looper 1%, these legs being secured to thespindle by means of the set-screws m m. One end of a rod, S, is looselyconnected to the looper at the points 00, Figs. 3 and 5, the oppositescrewed end of the rod passing through the projection nv on the piece T,and being secured to the same by two nuts-"one situated 011 each side ofthe projection-eso that the length of the rod, and consequently theposition of the point of the looper as regards that of the needle, maybe regulated at pleasure. The piece T is connected to the under side ofthe base by means of the stud i, which passes through an oblong slot inthe piece and screws into the base, so that thepiece T, with the rod S,may be allowed a limited reciprocating as well as a vibrating movementon the stud t as the center of vibration. A pin projects from the end ofthe piece T, and on this pin is a roller, fitting freely in a groove cutin the periphery of the cam-wheelE. This glOOX'G is of such a curved orzigzag form that when the cam-wheel turns a reciprocating motion isimparted to the piece T, and consequently, through .the rod S, avibrating motion to the looper, the groove being so curved that thelooper shall vibrate once for every stitch produced by the machine.

It will now be seen that three distinct movements are imparted to thelooper: first, the curved reciprocating motion of its point from andtoward and past the needle, obtained from the vibration of the spindlel? as actuated by the double-scroll-cam recess on the back of the wheelE, in connection with the arm Q; second, the lateral vibrating motion,caused by the are ment.

v of the needle-thread.

tion. of the curved groove in the periphery of the wheel E on thesliding piece T and adjustable rod S third, another lateral motion ofthe looper, caused by the peculiar position of the stud t as regardsthat of the loop er, the point of the latter being turned laterally asit-is caused to approach the same by the vibration of the sh aft P, for,as the sliding piece T is stationary as regards reciprocating motionwhen the above lateral motion is required, it is evident that as thelooper advances toward the needle the rod S and sliding piece T mustturn on the stud t, consequently turning the looper laterally to theamount required.

It will be observedthat a finger, p, is jointed to the side of thelooper in such a manner that it may be readily caused to assume eitherof the positions shown inEigs. 3 and 5.

. Operation: When the moving parts of the machine are'in the positionshown in the drawingsthat is, with the needle depressed to its lowestposition and the looper moved to its utmost extent from the needle-thesliding piece T has, by the action .of the curved groove in theperiphery of the wheel E, been moved.

back and the point of the looper turned back laterally from the needle,in which position it remains as the point, by the vibration of the shaftP, approaches the needle and until the point reaches thelimit of itsforward move- As the point of the looper is in the act of approachingthe needle the rod S and sliding piece T must necessarily turn on thepin it, and this turning of the rod must necessarily draw back the pointof the looper laterally,

the amount of this movement being so regulated by adjusting the rod S tothe sliding piece Tthat the point of the looper is momentarily incontact with the back of the needle, thereby insuring its passagethrough the loop Just as the needlehas been raised to its highestposition, and when the looper has arrived at the required distance pastthe needle, the groove in the periphery of the wheel E pushes forwardthe sliding piece,

and consequently turns the point of the looper laterally toward the lineof the needle-thread so that as the needle descends its point must passbetween the looping-thread and the looper. When this has beenaccomplished, the piece T is again mov'edback and the point of thelooper turned away from the needle, thereby preventing thelooping-thread frombeingworn or cut a defect common to othersewing-machines through the friction of the looper against the needle.The looper being now moved back to its original position, and the needlebeing depressed, a repetition of the above de'scribed movements takesplace.

The formation of the double chain-stitch by the combined action of theneedle and looper is precisely .the same as in other well-knownmachines, so that a minute description of the same will be unnecessary.7

By turning up the finger p to the position shown in Fig. 5, and bydisconnecting the looping-thread from the looper, the latter becomesadapted for forming the single chain-stitch, for as the point of thelooper thus arranged seizes the loop of the needlethread the latter isheld in such a position that the descending needle passes through theloop.

I claim and desire to secure by Letters Pat ent 1. The combination ofthe looper R with the spindle N, when the former is rendered adj ustableto the latter substantially in the manner herein described, and when thespindle is al lowed to turn so as to accommodate itself to the lateralmovement of the looper.

2. The combination of the finger p with the looper R, in the manner andfor the purpose specified.

In testimony whereof I have signed my name to this specification beforetwo subscribing witnesses.

GEORGE FETTER.

WVitnesses:

HENRY HoWsoN, WILLIAM DUTTON.

